# Digital image watermarking based on angle quantization in discrete contourlet transform

> Research article (Journal of King Saud University - Computer and Information Sciences, 2016) · cited 20× · AI/ML

**Wikidata**: [openalex:W2324670398](https://www.wikidata.org/wiki/openalex:W2324670398)  
**Source**: https://4ort.xyz/entity/digital-image-watermarking-based-on-angle-quantization-in-discrete-contourlet-transform